Alternative methods for selecting the ventricular axis, calculating regional ejection fraction and choosing the number of ventricular divisions were studied In 15 normal volunteers to select the combination of parameter that produced the lowest variability in quantitative regional ejection fraction. (onlinejacc.org)

Methods for quantitative comparison, of regional ejection fraction with normal limit files and for display in the bull's-eye format were also examined. (onlinejacc.org)

Calculating regional ejection fraction by dividing the regional stroke volume by the enddiastollc volume of the region gave a lower coefficient of variability and a more easily understood value than dividing the regional stroke volume by the total end-diastolic volume of the ventricle. (onlinejacc.org)

In the right bottom panel of the Figure, where the decreased E es (1.1 mm Hg/cm 2 ) was demonstrated after PLV, the end-systolic pressure-area line did not connect the end-systolic points (left upper corner) of each loop but connected early ejection phase (right upper corner) of each loop. (ahajournals.org)